JPH0620736Y2 - Reversing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a reversing device used in a processing line for a steel column or the like.

[Prior Art] For example, a large number of small joint members for attaching a beam or the like are welded to the four faces of a steel frame column having a quadrangular sectional shape. In the step of welding the connection member, the steel column is inverted to make the welding posture downward (workability). Then, after the attachment of the joint parts is completed, the steel column is directly conveyed to the next step.

As shown in FIG. 4, the reversing mechanism of the conventional reversing device has 4
An endless chain 12 was hung on each sprocket 17, 20.

Then, first, the sprocket 17 is lowered by the cylinder 18 to lower the chain 12 to below the carry-in roller 14, the carried-in steel frame column 13 is positioned on the chain 12, and when the steel frame column 13 is reversed, the chain 12 is carried to the carry-in roller 14. The sprocket 17 is pushed up by the cylinder 18 to a height where the corners of the steel column do not hit, and the steel column 13 is lifted.

The steel column was hung by pushing down the chain 12 hung between the sprockets 17 as shown in the figure. (WELTEC No. 4 issued October 10, 1988
Volume) [Problems to be solved by the invention] In the above-mentioned conventional reversing mechanism, the sprocket 17 is pushed up by the cylinder 18 to lift the suspended steel frame column, so that the following problems occur. .

That is, in FIG. 4, the horizontal component force of the tension T of the chain 12 generated by the weight of the steel column 13 always causes a bending force on the cylinder rod 19.

Therefore, the seal portion between the cylinder 18 and the rod 9 is squeezed, which causes a problem that the friction at this portion is severe.

Further, since the steel column is a heavy object, when the steel column is turned over, a considerable amount of swaying occurs, and this swaying force also acts on the rod and causes deformation of the rod. Therefore, the cylinder must have sufficient strength to withstand, and has the disadvantage that a large cylinder must be used.

Since the steel column is a long object, it hangs three or four places in the longitudinal direction. For example, when three places are hung, a total of six cylinders are required, and All six cylinder strokes must be synchronized.

If the stroke length or timing of each cylinder is misaligned at the time of reversal, the reversal of the steel column, which is a heavy load, may not go as expected by the worker.
There is a problem of causing an unexpected accident.

Also, since the chain is hung so that the chain 12 stretched between the sprockets 17 is pushed down, there is a possibility that the steel frame pillar may fall out when it is turned over, resulting in damage to the sprockets and cylinders, and accidents. There is a problem that occurs.

In addition, a reversing device as disclosed in Japanese Patent Laid-Open No. 57-151585 has been proposed, but this device supports the work on an endless belt and raises the endless belt with a lifter to lift the endless belt. The work is turned to reverse the work. However, this device requires that the end belt be largely lifted by a stroke commensurate with the reversal of the work. That is,
There is a problem that the stroke amount is large and the reversing work efficiency is poor.

[Means for Solving the Problems] According to the configuration of the present invention for solving the above problems, a board that is vertically moved by a cylinder along a vertically standing guide pillar is provided on a carriage, and the board is provided with the guide. A guide roller in the Y direction is provided along the pillar, and a guide roller in the X direction for guiding the substrate is provided on a horizontal beam horizontally installed on the guide pillar, and the sprocket is opposed to the substrate in the traveling direction of the carriage. In the reversing device, the endless chain is provided so as to face the sprocket and supports and inverts the reversal conveyed object. In the reversing device, the horizontal beam is provided with a tension wheel that abuts on the upper side of the chain portion between the two sprockets.

[Operation] With this configuration, the weight of the steel frame column suspended by the chain is received by the sprocket, and the received weight is moved in the vertical direction by the guide roller in the X and Y directions. It is taken out as monkey power.
The vertical force acting on this substrate is received by the cylinder.

Further, when the substrate is raised by the cylinder when the steel column is reversed, the chain is stretched by the tensioning wheel in relation to the weight of the suspended steel column. As a result, the ascending stroke of the board is only half, the meshing between the chain and the sprocket is ensured, and the steel column is reliably inverted.

[Embodiment] An embodiment of the present invention will be described in detail below.

In FIG. 1, guide pillars 1 are vertically provided on four corners of a dolly 21 having a rectangular planar shape. This guide pillar 1
As shown in FIG. 2, two guide columns 1a are provided as a set, and two sets are provided upright in the loading direction of the steel frame columns 13. Reference numeral 2 is a horizontal beam having the same shape as that of the carriage 21, and the horizontal beam 2 is horizontally mounted on the guide columns 1 and 1a standing upright at the four corners. Reference numeral 11 is a downward U-shaped substrate, and the guide columns 1 and
It is inserted between 1a, and its plate surface is orthogonal to the longitudinal axis direction of the steel column 13. Numeral 3 is a cylinder attached to each of the horizontal beams 2, and both substrates 11 are moved up and down. Guide rollers 7 and 8 are provided on the lower portions of both sides of the substrate 11 so as to contact the inner side surfaces of the guide columns 1 and 1a. The guide rollers 7 and 8 are arranged so that the substrate 11 is guided in the vertical direction (Y direction) along the guide columns 1 and 1a.
Are adapted to abut on both inner side surfaces of the guide columns 1 and 1a and roll. Reference numeral 5 is a sprocket that is axially supported by the shaft 6 at the lower portions on both sides of each substrate 11. The sprockets 5 are spaced apart in the traveling direction of the carriage 21 and are provided so as to face each other. Reference numeral 4 denotes a tension wheel which is located substantially at the center of the sprocket 5, is fixed to the lower surfaces of the front and rear cross beams 2, and is pivotally supported by the bracket so as to be located on the same plane as the sprocket 5.

Reference numeral 10 is a guide roller pivotally supported by the horizontal beam 2, and is adapted to roll along guide rails 9 provided on both front and rear surfaces of the front and rear substrates 11 as shown in FIG. .

In this way, both substrates 11 are moved up and down by the cylinder 3 while being accelerated in the X and Y directions by the Y direction guide rollers 7 and 8 and the X direction guide rollers 10. Reference numeral 12 is a chain hung on the sprocket 5.

Reference numeral 16 denotes a traveling action rail of the carriage 21, and a carry-in roller 14 having an axis orthogonal to the axis of the traveling rail 16.
Are provided on the carriage 21 at appropriate intervals. 15 is a wheel.

In FIG. 2, the substrate 11 inserted between the guide columns 1 and 1a.
Has a box shape, and the sprockets 5 are rotatably supported on the lower portions of both sides of each board 11. Four Y-direction guide rollers 7 and 8 are provided for a pair of guide columns 1 and 1a so as to roll along both sides of the guide columns 1 and 1a.

[Description of Operation] The operation of the present embodiment configured as described above will be described below.

In FIG. 1, the substrate 11 is a sprocket 5 of the substrate 11.
The lower side of the chain 12 that has been spun around is lowered to a position below the upper surface of the carry-in roller 14. Then, the chain 12 is attached to the steel column 13 that has been carried in by the carry-in roller 14.
Hang up.

Then, the cylinder 3 raises the substrate 11 to the position 11a as shown by the phantom line in the figure. As a result, the sprocket 5 comes to the position of 5a, and the chain 12 between the left and right sprockets 5 is stretched by the tensioning wheel 4 so as to be pushed downward.

In the series of operations described above, the weight of the steel column 13 first acts on the beam shaft 6 of the sprocket 5, and the force acting on the shaft 6 is exactly divided into two because the steel column 13 is naturally suspended on the chain 12. Further, since the tension wheel 4 is located in the center between the sprockets 5, the tension of the chain 12 is almost evenly distributed.

The gravity of the steel column 13 acting on the shaft 6 acts on the substrate 11 as described above, but the substrate 11 is constrained in the X and Y directions by the guide rollers 7 and 8 in the Y direction and the guide roller 10 in the X direction. Therefore, the force acts on the substrate 11 in a completely vertical direction.

Therefore, the cylinder 3 for raising and lowering the substrate 11 also acts as a vertical force, and no bending force is generated on the rod of the cylinder 3.

Next, as shown in FIG. 3, the steel column 13 is reversed by rotating either the sprocket 5 or the tension wheel 4 as a power vehicle in the direction of the arrow.

During this inversion, the steel column 13 is surrounded by the chain 12 having the endless structure, so that it will not fall off. When the chain 12 is reversed, the chain 12 sways, but the swaying force is restrained by the Y-direction guide rollers 7 and 8 and the X-direction guide roller 10 and does not directly act on the cylinder 3. Then, since the upper side of the chain 12 is stretched downward by the tensioning wheel 4, the lifting stroke of the board 11 can be halved and the sprocket 5
And the chain 12 mesh more securely, and the steel column 13
Is surely reversed.

[Effect of the Invention] According to the configuration of the present invention as described above, the following effects can be obtained.

(a) The substrate is constrained by the X and Y direction guide rollers,
Since the bending force is not applied to the cylinder, it is possible to reduce the size and size of the cylinder as well as prolong the life of the cylinder by not applying excessive force to it. (B) The sprocket on which the chain is hung up and down. The sprocket is fixed to the board, and the board is lifted up and down by a cylinder, and the sprocket is provided in the approximate center of the sprocket, so when the weight of the steel column is applied,
The positional relationship between the tension wheel and the center of gravity of the steel column is always constant, the tension acting on the chain is evenly distributed, and the lifting stroke of the board is only half, which improves the reversal efficiency of the steel column. Can be achieved.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of the present invention, FIG. 2 is a side view of the same, FIG. 3 is an explanatory view showing the operation and reversing operation of the substrate in FIG. 1, and FIG. 4 is a conventional reversing device. FIG. 1, 1a …… Guiding pillar, 2 …… Horizontal beam, 3 …… Cylinder, 4…
… Tension wheel, 5 sprocket, 7,8 …… Y direction guide roller, 10 …… X direction guide roller, 11 …… substrate, 12 …… chain.

Claims (1)

[Scope of utility model registration request] 1. A substrate which is vertically moved by a cylinder along a vertically extending guide pillar is provided on a carriage, and a guide roller in the Y direction is provided on the substrate along the guide pillar. A guide roller in the X direction for guiding the substrate is provided on a horizontal beam horizontally installed on the substrate, sprockets are provided on the substrate so as to be spaced apart from each other in the traveling direction of the carriage, and the reversal conveyance object is supported and inverted by the sprocket. The reversing device having an endless chain hung, wherein the transverse beam is provided with a tensioning wheel that abuts on an upper side of a chain portion between the both sprockets.